When you installed CC 2019 did you use the option to import previous settings and preferences? If so this could be at least part of the problem with poor performance (though I doubt it has anything to do with your pdf problem). Try trashing your old preferences and see if, at least your overall performance improves.

To do so:

For Macintosh Users: The User Library folder in which InDesign’s preferences are stored is hidden by default on most Macintoshes. To access it make sure that InDesign is closed and click on the desktop to launch a Finder Window (Command-N). With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder find the folder called Preferences and within it find the folder called “Adobe InDesign” and the file called “com.adobe.InDesign.plist” and delete both that folder and that file. When InDesign is next launched it will create new preference files and the program will be restored to its defaults.

For Windows Users: You can try the quick way of resetting on a PC which is to hold down Ctrl + Alt + Shift when launching InDesign and respond affirmatively when asked if you want to reset. There have been some recent reports that the window asking if you want to reset is not popping up but that the prefs are being reset anyway. If this works great but if it doesn’t you may have to manually delete them.

To do so:

On Windows 7 and above the preference files are hidden. To find them go to the Control Panel and open Folder Options and then click the View tab. Then select “Show hidden files and folders” or “Show hidden files, folders or drive options” in Advanced Settings. Then delete (or rename) the folder at the end of this path: C:\Users\<USER>\AppData\Roaming\Adobe\InDesign\<Version #>\<Language>. Make sure that InDesign is closed when you do this. When you relaunch the program it will create new preference files and the program will be at its default settings.

The advantage of manually deleting preference files is that after you’ve reset up the program (make sure that no document window is open) to your liking, you can create copies of your personalized “mint” preference files (make sure that you quit the program before copying them—that finalizes your customization) and use them in the future to replace any corrupt versions you may need to delete.

I would also recommend making sure, as Bob has already suggested, making sure that the 14.0.1 update is installed.

If i export a certain file with Indesign 2019 into a PDF (smallest Filesize) it generates a 14MB File. ... I tried everything in Indesign and in Acrobat Pro. Any ideas? ... PLS unsign me from your Betatesting.

Hi

When you choose Smallest, does it say “modified” after it or not?

Please tell us the “everything” that you have already tried in InDesign and in Acrobat Pro so we don’t repeat those ideas, thanks!

And we can’t remove you from the beta testing on this user-to-user forum, as we are users, just like yourself. You have to do that through the pre-release forum.

I cant find a way to lower the filesize to 2MB anymore. I tried everything in Indesign and in Acrobat Pro.

Let's review your workflow:

Did you customize the Smallest File Size job option? What settings do you see for File > Export > Adobe PDF (Print) > Compression? These are the defaults:

What about General? What is the Compatibility set to? Is Fast Web view activated? Is Create Tagged PDF on?

What exactly did you try in Acrobat Pro?

File > Save as Other > Reduced Size PDF will allow you to change the Compatibility after the creating the PDF (higher compatibility equals a somewhat smaller PDF) and File > Save as Other > Optimized PDF allows you to increase the compression settings. Normally, we address both of these in the Export PDF dialog box, and just use Acrobat to fix them when we made a mistake while exporting, and can't re-export for some reason, i.e., we no longer have access to the original file.